Vibration Control of an Engine Mount for UAV Activated by Piezostack Actuator

2011 ◽  
Vol 52-54 ◽  
pp. 358-364
Author(s):  
Jong Seok Oh ◽  
Seung Bok Choi
Keyword(s):  
Vibration Control ◽  
Sliding Mode ◽  
Active Vibration Control ◽  
Effective Control ◽  
Control Performance ◽  
Vibration Level ◽  
Frequency Domains ◽  
Active Vibration ◽  
Engine Mount ◽  
Active Engine

In this paper, vibration control performance of piezostack active engine mount system for unmanned aero vehicle (UAV) is evaluated via computer simulation. As a first step, the dynamic model of engine mount system which is supported at three points is derived. In the configuration of engine mount system, the inertia type of piezostack based active mount is installed for active vibration control. Then, the vibration level of UAV engine is measured. To attenuate the vibration which is transmitted from engine, a sliding mode controller which is robust to uncertain parameters is designed. Vibration control performances of active engine mount system are evaluated at each mount and center of gravity. Effective Control results are presented in both time and frequency domains.

scholarly journals Ultra-low frequency active vibration control for cold atom gravimeter based on sliding-mode robust algorithm

2018 ◽  
Vol 67 (2) ◽  
pp. 020702
Author(s):  
Luo Dong-Yun ◽  
Cheng Bing ◽  
Zhou Yin ◽  
Wu Bin ◽  
Wang Xiao-Long ◽  
...  
Keyword(s):  
Vibration Control ◽  
Sliding Mode ◽  
Active Vibration Control ◽  
Low Frequency ◽  
Cold Atom ◽  
Robust Algorithm ◽  
Active Vibration

Investigation of active vibration control system for trailed two-wheeled implements

2011 ◽  
Vol 226 (1) ◽  
pp. 55-65 ◽  
Author(s):  
H-J Kim
Keyword(s):  
Control System ◽  
Vibration Control ◽  
Sliding Mode ◽  
Model Simulation ◽  
Active Vibration Control ◽  
The Body ◽  
Actual Performance ◽  
The Road ◽  
Force Tracking ◽  
Active Vibration

This paper presents an active vibration control (AVC) system for trailed two-wheeled implements (TTWI) equipped with high precision electronic devices. With the aim of isolating disturbance forces to the devices, a hydraulically actuated vibration control system is devised. In order to suppress vibratory motions to the body components, considering the TTWI system characteristics, a vibration control and a force tracking control strategy is adopted. As the vibration controller, the adaptive and skyhook control schemes are applied. From full order and reduced order model for the actuating module, as the tracking controller, the sliding mode control scheme is adopted regarding parameter variations. On the basis of the roll plane TTWI system model, simulation work is performed. Finally, after implementation of the experimental setup with the TTWI system and the road simulating module considering practical requirements, actual performance of the devised AVC system is evaluated in various disturbance conditions.

scholarly journals Identification of Chatter Vibrations and Active Vibration Control by Using Sliding Mode Controller on Dry Turning of Ti6al4v

2021 ◽  
Author(s):  
Mehmet Ali GUVENC ◽  
Hasan Huseyin BILGIC ◽  
Selçuk MISTIKOĞLU
Keyword(s):  
Vibration Control ◽  
Active Control ◽  
Finite Impulse Response ◽  
Sliding Mode ◽  
Block Diagram ◽  
Active Vibration Control ◽  
Control Block ◽  
Acceleration Data ◽  
Chatter Vibrations ◽  
Active Vibration

Abstract In recent years, with the development of sensor technologies, communication platforms, cyber physical systems, storage technologies, internet applications and controller infrastructures, the way has been opened to produce competitive products with high quality and low cost. In turning, which is one of the important processes of machining, chatter vibrations are among the biggest problems affecting product quality, productivity and cost. There are many techniques proposed to reduce chatter vibrations for which the exact cause cannot be determined. In this study, an active vibration control based on Sliding Mode Control (SMC) has been implemented in order to reduce and eliminate chatter vibration, which is undesirable for the turning process. In this context, three-axis acceleration data were collected from the cutting tool during the turning of Ti6Al4V. Finite Impulse Response (FIR) filtering, Fast Fourier Transform (FFT) analysis and integral process were carried out in order to use the raw acceleration data collected over the system in control. The system was modeled mathematically and an active control block diagram was created. It was observed that chattering decreased significantly after the application of active vibration control. The surface quality formed by the amplitude of the graph obtained after active control has been compared and verified with the data obtained from the actual manufacturing result.

Vibration Control of Parallel Identical Flexible Structures Using Interactive Force

2001 ◽  
Author(s):  
Shigeru Kougo ◽  
Hiroshi Fujihara ◽  
Katsuhiko Yoshida ◽  
Hiroyuki Tanaka ◽  
Toru Watanabe ◽  
...  
Keyword(s):  
Vibration Control ◽  
Control Experiment ◽  
Natural Frequencies ◽  
Control Mechanism ◽  
Reaction Force ◽  
Active Vibration Control ◽  
Flexible Structures ◽  
Control Performance ◽  
Active Vibration ◽  
And Control

Abstract This paper deals with active vibration control of two identical flexible structures arranged in parallel. One of the authors had presented a vibration control mechanism so that two or more structures are connected via non-contact actuators in which one structure is utilized as a reaction wall for another structure’s control mutually. However, in such a mechanism, the control performance reduces as the natural frequencies of structures become closer. In this report, authors present a modified mechanism in which actuators are connected to the structures with long arms so that the direction of vibration in a mode differs on each structure. In this way, the reaction force from the actuator on structure is introduced to another structure for dissipative force even if the properties of structures are identical. Computer simulation and control experiment are carried out and the effectiveness of presented mechanism is confirmed.

scholarly journals Active Vibration Control of Rib Stiffened Plate by Using Decentralized Velocity Feedback Controllers with Inertial Actuators

2019 ◽  
Vol 9 (15) ◽  
pp. 3188 ◽  
Author(s):  
Xiyue Ma ◽  
Lei Wang ◽  
Jian Xu
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Low Frequency ◽  
Good Control ◽  
Practical Significance ◽  
Stiffened Plate ◽  
Control Performance ◽  
Feedback Controllers ◽  
Velocity Feedback ◽  
Active Vibration

Active control of low frequency vibration and sound radiation from a rib stiffened plate has great practical significance as this structure is widely applied in engineering, such as aircraft or ship fuselage shells. This paper presents an investigation on the performance of active vibration control of the rib stiffened plate by using decentralized velocity feedback controllers with inertial actuators. A simple modeling approach in frequency domain is proposed in this research to calculate the control performance. The theoretical model of vibrating response of the ribbed plate and the velocity feedback controllers is first established. Then, as an important part, the influences of the control gain and the number of the decentralized unit on the control performance are investigated. Results obtained demonstrate that—similar to that of the unribbed plate case—appropriately choosing the number of the unit and their feedback gains can achieve good control results. Too many units or very high feedback gains will not bring further noise reduction.

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